Multi-scale Study of Ecological, Self-healing, and Nano-engineered Self-centering Cementitious Composites for Modular Construction

用于模块化建筑的生态、自修复和纳米工程自定心水泥复合材料的多尺度研究

• 批准号: RGPIN-2015-04817
• 负责人: Nehdi, Moncef
• 金额: $ 2.04万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=707992
• 关键词: Multi; scale; Study; Ecological; Self

Canada faces an acute civil infrastructure dilemma. Construction activities consume 50% of materials extracted from the earth's crust and generate nearly half of the total solid waste, while the built environment accounts for about 40% of greenhouse gas (GHG) emissions. In chorus, civil infrastructure continues to deteriorate prematurely. Deferred maintenance has created a colossal backlog of aging structures, inflicting a veritable drain of national wealth and an infrastructure deficit evaluated at $125 Billion. Such a situation looms to stifle economic prosperity; stark reminders of the perilous condition of our civil infrastructure (e.g. collapse of Montreal's Concorde Viaduct) continue to emerge. This research aspires to be a viable initiative for unraveling this dilemma. It will coin novel ecological cementitious composites that can endure very long exposure in aggressive environments. Such binders will be engineered primarily using industrial by-products, thus reducing both GHG emissions and landfill disposal. The performance of such binders will be enhanced using nano-seeding to produce extremely low porosity and superior durability. They will further be endowed with self-healing ability to mitigate service life damage. Moreover, the new composite will be reinforced with corrosion-resistant shape memory alloys that provide strength and ductility, yet can self-repair and regain their original shape subsequent to excessive loading. This new system will be instrumented with Radio-Frequency Identification and piezo-resistive sensors in order to provide information for structural health monitoring. Building Information Modeling (BIM) will be used to forge a modular construction concept using the ecological, self-healing and smart composite. The performance of this new construction paradigm will be demonstrated through extensive multi-scale testing. It will have a competitive life cycle cost owing to exceptional durability and savings of modular construction, while producing resilient and sustainable civil infrastructure.  The Applicant has made significant progress in this area and is poised to further advancing this initiative provided a sustained support via an NSERC Discovery Grant. The significance of the research could be paramount; it offers a holistic approach to solving infrastructure durability and sustainability problems simultaneously. The impact of the research could be pervasive and its scholarly significance should advance knowledge in the area of sustainable and smart construction, putting Canada at the far front of this growing lucrative and competitive market. The participating six graduate and five undergraduate students will gain essential skills and knowledge to lead transformative advances in this field both in industry and academia.

加拿大面临着急性的民用基础设施困境。施工活动消耗了从地壳中提取的材料的50％，几乎产生了总固体废物的一半，而建筑环境约占温室气体（GHG）排放的40％。在合唱中，民用基础设施继续过早恶化。延期维护创造了衰老结构的巨大积压，造成了真正的国内财富的流失，并评估为1250亿美元的基础设施赤字。这种情况迫在眉睫，以扼杀经济繁荣；斯塔克（Stark）对我们的民用基础设施的危险状况（例如，蒙特利尔的协和高架桥的崩溃）继续出现。这项研究渴望成为解决这一难题的可行倡议。它将在侵略性环境中忍受很长时间的新生态胶结作品。此类粘合剂将主要使用工业副产品进行设计，从而减少温室气体排放和垃圾填埋场处置。这种粘合剂的性能将通过纳米种子增强，以产生极低的孔隙率和较高的耐用性。他们将进一步具有自我修复能力，以减轻服务寿命损害。此外，新的复合材料将通过耐腐蚀形状的记忆合金增强，可提供强度和延展性，但可以自我修复并在过度载荷后继续其原始形状。该新系统将使用射频识别和抗压电传感器进行仪器，以提供结构性健康监测的信息。建筑信息建模（BIM）将用于使用生态，自我修复和智能复合材料来制定模块化构造概念。这种新建筑范式的性能将通过广泛的多尺度测试来证明。由于出色的耐用性和模块化结构的节省，它将具有竞争性的生命周期成本，同时产生了韧性和可持续的民用基础设施。申请人在这一领域取得了重大进展，并被中毒以进一步推进该计划，从而通过NSERC Discovery Grant提供了持续的支持。研究的意义可能至关重要。它提供了一种整体方法来简单地解决基础设施耐用性和可持续性问题。这项研究的影响可能普遍存在，其科学意义应提高在可持续和智能建筑领域的知识，这使加拿大成为这个不断增长的有利可图和竞争激烈的市场的最远。参与的六名毕业生和五名本科生将获得基本的技能和知识，以领导该领域的行业和学术界的变革性进步。